Classroom “RULES” Chart – recording of students generalizing of mathematics properties and
rules.
a x b = b x a (knowing this helps to make fewer facts to “know” and can make
multiplication problems easier – example 5 x 167 x 2 = 5 x 2 x 167 = 10 x 167 = 1670Subtraction and division are not commutative.
(a x b) x c = a x (b x c)
Example: 82 x 25 x 4(82 x 25) x 4 = 82 x (25 x 4) = 82 x 100 = 8200Distributive Property of Multiplication – for a, b, and c,a(b + c) = (ab) + (ac)a(b – c) = (ab) – (ac)This property helps students with mental math.
1.
They can help you determine the factors of numbers.
Can the host fill tables of 5? No, 138 is not
divisible b...
Allowed
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